Gagan refers to the foreseen sky.
The purpose of the Jim Crow laws was to segregate and disenfranchise black Americans. The Jim Crow system, which was a racial caste class in actuality, was a series of immutable anti-black laws that mainly deprived African Americans the right to suffrage.
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Nations responded to threats to their allies by mobilizing their militaries.
By the time that anyone took back the decision to go to war, it was already too late because militaries got ready so quickly. It was like lighting a fuse, it happens so fast, it is almost impossible to stop.